You will never appreciate an online backup service more than when your hard drive crashes or when your computer is stolen, lost, or dropped.  There's no shortage of people who sing the praises of their chosen online backup service after having successfully recovered their cherished, would-be-lost data.   All of the online computer backup services we have reviewed, if used properly, offer at least an adequate safety net for these more dramatic scenarios.  But there are other causes of data that one should be prepared for.

A Few that are less talked about, but potentially devastating to your data:

• Accidental Deletion of a File
   
• Saving Over a Critical File
   
• Saving Undesired Edits Over the Original
   
• File Corruption

These are the ones that can sneak up on you and ruin your day, or worse.  This type of data loss costs companies millions in wasted manhours and data recovery costs.

In our online backup reviews we review quite a few services that offer file versioning.  File versioning saves previous versions of your files in case you need to go "back in time" to retrieve an earlier version of a file.  If you make bad edits to a file and save it, the older version is gone for good unless you have a backup of it's previous state.

Combine a fully automated online computer backup service with file versioning and you are much less likely to lose data due to the problems listed above.

All of the top eight of the online computer backup services we have reveiwed offer some kind of file versioning.  Read the reviews, or visit the companies' websites for details on their file versioning features.